Xiao Ming read a book. On the first day, he read 20% of the whole book. On the second day, he read 25% more than the first day. On the third day, he read 12 pages, which is exactly half of the whole book. How many pages does this book have It's the sixth grade method series, PEP, percentage unit I want to test Yuyao experiment in junior high school. Does anyone have a test paper

Xiao Ming read a book. On the first day, he read 20% of the whole book. On the second day, he read 25% more than the first day. On the third day, he read 12 pages, which is exactly half of the whole book. How many pages does this book have It's the sixth grade method series, PEP, percentage unit I want to test Yuyao experiment in junior high school. Does anyone have a test paper

Let a total of a pages be 0.2A + 0.25A + 12 = 0.5A, and a = 240

Xiao Ming read an extra-curricular book. On the first day, he read 3 / 8 of the whole book. On the second day, he read the remaining 1 / 3, and on the third day On the third day, I read the remaining 1 / 3, and there are 24 pages left in the end. How many pages are there in this book?

1 / 3 of 5 / 8 is 5 / 24, 1 / 3 of 5 / 12 is 5 / 36, so there are 5 / 18 left. It's 24 pages, so there are 86.4 pages

Xiao Ming finished reading a book in three days. On the first day, he read 20 pages, 1 / 4 more than on the second day. On the third day, he read 1 / 10 of the whole book. How many pages are there in this book? If you ask, you'll get nothing; if you're kind, you'll get an answer,

The next day = 20 (1 + 1 / 4) = 16 pages
(20 + 16) / (1-1 / 10) = 40 pages